Verilink PRISM 3060-10 (34-00252.4) Product Manual - Manual (Page 55)

Maintenance Screen 47
Port Unloop
Pressing Enter takes down the specified loop from the currently selected port.
Test
Loops
Loop status changes can be made only when the BERT function is not in the active
mode. The type of loop is chosen by toggling the spacebar and is executed by
pressing Enter. The normal operating mode and available loopback options for the
T1 network at the 3060-10 are shown in Figure 4-7 through Figure 4-11 and for the
DSU MP in Figure 4-11 and Table 4-4.
Normal Operation
Figure 4-7 depicts the unit’s normal operating mode.
NET LLB
The network line loopback command loops data received from the network back
toward the network (Figure 4-8). Received data is passed through to the DTE ports.
Network Interface
To Network
From Network
RJ48C
Framer/Deframer Multiplexer Receivers /Drivers
Receivers/Drivers
BERT Generator /
Detector
DTE (EIA530 or V.35)
(100' max.)
Framer/Deframer
DTE (DSX1)
RJ48C
DSX1, 1'-655'
to cross-connect
From
NET
To
NET
To
NET
From
NET
5
4
2
1 To
Ports
From
Ports
5
4
2
1
Figure 4-7 Normal Operation
Network Interface Framer /Deframer Multiplexer Receivers/Drivers
Receivers /Drivers
BERT Generator /
Detector
EIA 530 or V.35
(100' max.)
Framer /Deframer
DTE (DSX1)
RJ48C
DSX1, 1' -655'
to cross-connect
From
NET
To
NET
To
NET
From
NET
5
4
2
1
To Network
From Network
RJ48C
5
4
2
1 To
Ports
From
Ports
NET
LLB
Figure 4-8 Network LLB